Many thanks for such a thorough response Matt! Very much appreciated.
I'd found the getLearnerInfo() console.log, in adapt-offlineStorage-scorm.js, but I rooted around for ages searching for Moodle's handling of student name, only to draw a complete blank.
For clarity, I test my SCORM courses on a Moodle site I set up, but the client is using Workday. I think it's 'suck it and see' time - it may work fine on Workday. If not, as you say, best to contact them and see how to get it working.